c++ - Why does rand() return the same value using srand(time(null)) in this for loop?

Question

I have the following code

#include<iostream>
#include "time.h"

using namespace std;

void printRandomNumber()
{
    srand(time(NULL));
    cout << rand() % 3;
}

int main()
{
    for(int i=0; i<=5; i++)
    {
        printRandomNumber();
    }
system("pause");
}

The output is the same number repeated six times, I would like it to print out a mix of numbers.

Answer 1

Because you're seeding with the same value each time – time only has second-level precision, and I'm quite sure your computer can process those six loop iterations within one second. ;-]

Seed once, at the beginning of the program.